font system improvements

bind/v4k.lua

@@ -2327,6 +2327,7 @@ FONT_CJK = FONT_ZH|FONT_JP|FONT_KR,
  void  font_face_from_mem(const char *tag, const void *ttf_buffer, unsigned ttf_len, float font_size, unsigned flags);
  void  font_scales(const char *face_tag, float h1, float h2, float h3, float h4, float h5, float h6);
  void  font_color(const char *color_tag, uint32_t color);
+ void  ui_font();
  vec2  font_xy();
  void  font_goto(float x, float y);
  vec2  font_print(const char *text);
@@ -3341,7 +3342,7 @@ unsigned play;
 bool paused;
 struct atlas_t *a;
 } sprite_t;
-enum { OBJTYPE_sprite_t = 10 };       typedef struct { unsigned static_assert_on_L__LINE__ : !!(10 <= 255); } static_assert_on_Lconcat(_L,3962)___COUNTER__;       typedef struct { unsigned static_assert_on_L__LINE__ : !!(sizeof(sprite_t)); } static_assert_on_Lconcat(_L,3962)___COUNTER__;;
+enum { OBJTYPE_sprite_t = 10 };       typedef struct { unsigned static_assert_on_L__LINE__ : !!(10 <= 255); } static_assert_on_Lconcat(_L,3963)___COUNTER__;       typedef struct { unsigned static_assert_on_L__LINE__ : !!(sizeof(sprite_t)); } static_assert_on_Lconcat(_L,3963)___COUNTER__;;
  void     sprite_ctor(sprite_t *s);
  void     sprite_dtor(sprite_t *s);
  void     sprite_tick(sprite_t *s);

demos/01-font.c

@@ -110,5 +110,45 @@ int main() {
         font_print(FONT_MIDDLE   FONT_RIGHT  "middle\n");
         font_print(FONT_BASELINE FONT_RIGHT  "baseline\n");
         font_print(FONT_BOTTOM   FONT_CENTER "bottom\n");
+
+        {
+            vec2 pos = vec2(1290,120);
+            ddraw_push_2d();
+            char *txt = "This is the first line.\nAnd now the second line.\nYou can do a third great line, too!\n";
+            font_goto(pos.x, pos.y);
+            vec2 size=font_rect(txt);
+            ddraw_aabb(vec3(pos.x,pos.y,0), vec3(pos.x+size.x,pos.y+size.y,0));
+            font_print(txt);
+            ddraw_pop_2d();
+        }
+
+        {
+            vec2 pos = vec2(830,80);
+            ddraw_push_2d();
+            char *txt =  "Very iffy global text.";
+            font_goto(pos.x, pos.y);
+            vec2 size=font_rect(txt);
+
+            ddraw_aabb(vec3(pos.x,pos.y,0), vec3(pos.x+size.x,pos.y+size.y,0));
+            font_print(txt);
+            ddraw_pop_2d();
+        }
+
+        {
+            vec2 pos = vec2(830,160);
+            ddraw_push_2d();
+            char *txt =  FONT_H1 "Very iffy global text.";
+            font_goto(pos.x, pos.y);
+            vec2 size=font_rect(txt);
+
+            ddraw_aabb(vec3(pos.x,pos.y,0), vec3(pos.x+size.x,pos.y+size.y,0));
+            font_print(txt);
+            ddraw_pop_2d();
+        }
+
+        if (ui_panel("Fonts", 0)) {
+            ui_font();
+            ui_panel_end();
+        }
     }
 }

engine/joint/v4k.h

@@ -16120,6 +16120,7 @@ API void  font_face(const char *face_tag, const char *filename_ttf, float font_s
 API void  font_face_from_mem(const char *tag, const void *ttf_buffer, unsigned ttf_len, float font_size, unsigned flags);
 API void  font_scales(const char *face_tag, float h1, float h2, float h3, float h4, float h5, float h6);
 API void  font_color(const char *color_tag, uint32_t color);
+API void  ui_font();
 
 // commands
 API vec2  font_xy();
@@ -359908,6 +359909,7 @@ typedef struct font_t {
     int height;      // bitmap height
     int width;       // bitmap width
     float font_size; // font size in pixels (matches scale[0+1] size below)
+    float factor;    // font factor (font_size / (ascent - descent))
     float scale[7];  // user defined font scale (match H1..H6 tags)
 
     // displacement info
@@ -359971,6 +359973,27 @@ void font_color(const char *tag, uint32_t color) {
     }
 }
 
+void ui_font() {
+    for( int i = 0; i < countof(fonts); ++i ) {
+        if( ui_collapse(va("Font %d", i), va("%p%d", &fonts[i], i) ) ) {
+            font_t *f = &fonts[i];
+            // changed = i+1;
+            // for( int j = 0; j < array_count(a->anims[i].frames); ++j ) {
+            //     if( ui_collapse(va("[%d]",j), va("%p%d.%d", a, a->anims[i].name,j) ) ) {
+            //         ui_unsigned("Frame", &a->anims[i].frames[j]);
+            //         ui_atlas_frame(a->frames + a->anims[i].frames[j]);
+            //         ui_collapse_end();
+            //     }
+            // }
+            ui_float("Ascent", &f->ascent);
+            ui_float("Descent", &f->descent);
+            ui_float("Line Gap", &f->linegap);
+            f->linedist = (f->ascent-f->descent+f->linegap);
+            ui_collapse_end();
+        }
+    }
+}
+
 void font_scales(const char *tag, float h1, float h2, float h3, float h4, float h5, float h6) {
     font_init();
 
@@ -360116,13 +360139,14 @@ void font_face_from_mem(const char *tag, const void *ttf_data, unsigned ttf_len,
     stbtt_InitFont(&info, ttf_data, stbtt_GetFontOffsetForIndex(ttf_data,0));
 
     int a, d, l;
-    float s = stbtt_ScaleForPixelHeight(&info, f->font_size);
+    if (!stbtt_GetFontVMetricsOS2(&info, &a, &d, &l))
-    stbtt_GetFontVMetrics(&info, &a, &d, &l);
+        stbtt_GetFontVMetrics(&info, &a, &d, &l);
 
-    f->ascent = a * s;
+    f->ascent = a;
-    f->descent = d * s;
+    f->descent = d;
-    f->linegap = l * s;
+    f->linegap = l;
-    f->linedist = (a - d + l) * s;
+    f->linedist = (a - d + l);
+    f->factor = (f->font_size / (f->ascent - f->descent));
 
     // save some gpu memory by truncating unused vertical space in atlas texture
     {
@@ -360240,8 +360264,6 @@ void font_face_from_mem(const char *tag, const void *ttf_data, unsigned ttf_len,
     glUniform2f(glGetUniformLocation(f->program, "res_bitmap"), f->width, f->height);
     glUniform2f(glGetUniformLocation(f->program, "res_meta"), f->num_glyphs, 2);
     glUniform1f(glGetUniformLocation(f->program, "num_colors"), FONT_MAX_COLORS);
-    glUniform1f(glGetUniformLocation(f->program, "offset_firstline"), f->linedist-f->linegap);
-
     (void)flags;
 }
 
@@ -360302,6 +360324,7 @@ void font_draw_cmd(font_t *f, const float *glyph_data, int glyph_idx, float fact
     glUseProgram(f->program);
     glUniform1f(glGetUniformLocation(f->program, "scale_factor"), factor);
     glUniform2fv(glGetUniformLocation(f->program, "string_offset"), 1, &offset.x);
+    glUniform1f(glGetUniformLocation(f->program, "offset_firstline"), f->ascent*f->factor);
 
     GLint dims[4] = {0};
     glGetIntegerv(GL_VIEWPORT, dims);
@@ -360353,7 +360376,7 @@ vec2 font_draw_ex(const char *text, vec2 offset, const char *col, void (*draw_cm
     font_t *f = &fonts[0];
     int S = 3;
     uint32_t color = 0;
-    float X = 0, Y = 0, W = 0, L = f->linedist*f->scale[S], LL = L; // LL=largest linedist
+    float X = 0, Y = 0, W = 0, L = f->ascent*f->factor*f->scale[S], LL = L; // LL=largest linedist
     offset.y = -offset.y; // invert y polarity
 
     // utf8 to utf32
@@ -360368,7 +360391,10 @@ vec2 font_draw_ex(const char *text, vec2 offset, const char *col, void (*draw_cm
             // change cursor, advance y, record largest x as width, increase height
             if( X > W ) W = X;
             X = 0.0;
-            Y -= L;
+            Y -= f->linedist*f->factor*f->scale[S];
+            if (i+1==end) { //@hack: ensures we terminate the height at the correct position
+                Y -= (f->descent+f->linegap)*f->factor*f->scale[S];
+            }
             continue;
         }
         if( ch >= 1 && ch <= 6 ) {
@@ -360377,11 +360403,12 @@ vec2 font_draw_ex(const char *text, vec2 offset, const char *col, void (*draw_cm
             t = text_glyph_data;
 
             // reposition offset to align new baseline
-            offset.y += (f->linedist - f->linegap) * ( f->scale[ch] - f->scale[S] );
+            // @fixme:
+            // offset.y += (f->linedist - f->linegap) * ( f->scale[ch] - f->scale[S] );
 
             // change size
             S = ch;
-            L = f->linedist*f->scale[S];
+            L = f->ascent*f->factor*f->scale[S];
             if(L > LL) LL = L;
             continue;
         }
@@ -360962,7 +360989,7 @@ bool gui_slider_id(int id, vec4 rect, const char *skin, float min, float max, fl
     cursorrect.x += cursorpos.x;
     cursorrect.y += cursorpos.y;
     cursorrect.z = cursorsize.x;
-    cursorrect.w = cursorsize.y;
+    cursorrect.w = max(cursorsize.y, rect.w);
     if (last_skin->drawrect) last_skin->drawrect(last_skin->userdata, cursorskin, fbcursor, cursorrect);
 
     return entry->held && (old_value!=*value);

engine/split/v4k_font.c

@@ -1583,6 +1583,7 @@ typedef struct font_t {
     int height;      // bitmap height
     int width;       // bitmap width
     float font_size; // font size in pixels (matches scale[0+1] size below)
+    float factor;    // font factor (font_size / (ascent - descent))
     float scale[7];  // user defined font scale (match H1..H6 tags)
 
     // displacement info
@@ -1646,6 +1647,27 @@ void font_color(const char *tag, uint32_t color) {
     }
 }
 
+void ui_font() {
+    for( int i = 0; i < countof(fonts); ++i ) {
+        if( ui_collapse(va("Font %d", i), va("%p%d", &fonts[i], i) ) ) {
+            font_t *f = &fonts[i];
+            // changed = i+1;
+            // for( int j = 0; j < array_count(a->anims[i].frames); ++j ) {
+            //     if( ui_collapse(va("[%d]",j), va("%p%d.%d", a, a->anims[i].name,j) ) ) {
+            //         ui_unsigned("Frame", &a->anims[i].frames[j]);
+            //         ui_atlas_frame(a->frames + a->anims[i].frames[j]);
+            //         ui_collapse_end();
+            //     }
+            // }
+            ui_float("Ascent", &f->ascent);
+            ui_float("Descent", &f->descent);
+            ui_float("Line Gap", &f->linegap);
+            f->linedist = (f->ascent-f->descent+f->linegap);
+            ui_collapse_end();
+        }
+    }
+}
+
 void font_scales(const char *tag, float h1, float h2, float h3, float h4, float h5, float h6) {
     font_init();
 
@@ -1791,13 +1813,14 @@ void font_face_from_mem(const char *tag, const void *ttf_data, unsigned ttf_len,
     stbtt_InitFont(&info, ttf_data, stbtt_GetFontOffsetForIndex(ttf_data,0));
 
     int a, d, l;
-    float s = stbtt_ScaleForPixelHeight(&info, f->font_size);
+    if (!stbtt_GetFontVMetricsOS2(&info, &a, &d, &l))
-    stbtt_GetFontVMetrics(&info, &a, &d, &l);
+        stbtt_GetFontVMetrics(&info, &a, &d, &l);
 
-    f->ascent = a * s;
+    f->ascent = a;
-    f->descent = d * s;
+    f->descent = d;
-    f->linegap = l * s;
+    f->linegap = l;
-    f->linedist = (a - d + l) * s;
+    f->linedist = (a - d + l);
+    f->factor = (f->font_size / (f->ascent - f->descent));
 
     // save some gpu memory by truncating unused vertical space in atlas texture
     {
@@ -1915,8 +1938,6 @@ void font_face_from_mem(const char *tag, const void *ttf_data, unsigned ttf_len,
     glUniform2f(glGetUniformLocation(f->program, "res_bitmap"), f->width, f->height);
     glUniform2f(glGetUniformLocation(f->program, "res_meta"), f->num_glyphs, 2);
     glUniform1f(glGetUniformLocation(f->program, "num_colors"), FONT_MAX_COLORS);
-    glUniform1f(glGetUniformLocation(f->program, "offset_firstline"), f->linedist-f->linegap);
-
     (void)flags;
 }
 
@@ -1977,6 +1998,7 @@ void font_draw_cmd(font_t *f, const float *glyph_data, int glyph_idx, float fact
     glUseProgram(f->program);
     glUniform1f(glGetUniformLocation(f->program, "scale_factor"), factor);
     glUniform2fv(glGetUniformLocation(f->program, "string_offset"), 1, &offset.x);
+    glUniform1f(glGetUniformLocation(f->program, "offset_firstline"), f->ascent*f->factor);
 
     GLint dims[4] = {0};
     glGetIntegerv(GL_VIEWPORT, dims);
@@ -2028,7 +2050,7 @@ vec2 font_draw_ex(const char *text, vec2 offset, const char *col, void (*draw_cm
     font_t *f = &fonts[0];
     int S = 3;
     uint32_t color = 0;
-    float X = 0, Y = 0, W = 0, L = f->linedist*f->scale[S], LL = L; // LL=largest linedist
+    float X = 0, Y = 0, W = 0, L = f->ascent*f->factor*f->scale[S], LL = L; // LL=largest linedist
     offset.y = -offset.y; // invert y polarity
 
     // utf8 to utf32
@@ -2043,7 +2065,10 @@ vec2 font_draw_ex(const char *text, vec2 offset, const char *col, void (*draw_cm
             // change cursor, advance y, record largest x as width, increase height
             if( X > W ) W = X;
             X = 0.0;
-            Y -= L;
+            Y -= f->linedist*f->factor*f->scale[S];
+            if (i+1==end) { //@hack: ensures we terminate the height at the correct position
+                Y -= (f->descent+f->linegap)*f->factor*f->scale[S];
+            }
             continue;
         }
         if( ch >= 1 && ch <= 6 ) {
@@ -2052,11 +2077,12 @@ vec2 font_draw_ex(const char *text, vec2 offset, const char *col, void (*draw_cm
             t = text_glyph_data;
 
             // reposition offset to align new baseline
-            offset.y += (f->linedist - f->linegap) * ( f->scale[ch] - f->scale[S] );
+            // @fixme:
+            // offset.y += (f->linedist - f->linegap) * ( f->scale[ch] - f->scale[S] );
 
             // change size
             S = ch;
-            L = f->linedist*f->scale[S];
+            L = f->ascent*f->factor*f->scale[S];
             if(L > LL) LL = L;
             continue;
         }

engine/split/v4k_font.h

@@ -75,6 +75,7 @@ API void  font_face(const char *face_tag, const char *filename_ttf, float font_s
 API void  font_face_from_mem(const char *tag, const void *ttf_buffer, unsigned ttf_len, float font_size, unsigned flags);
 API void  font_scales(const char *face_tag, float h1, float h2, float h3, float h4, float h5, float h6);
 API void  font_color(const char *color_tag, uint32_t color);
+API void  ui_font();
 
 // commands
 API vec2  font_xy();

engine/split/v4k_gui.c

@@ -262,7 +262,7 @@ bool gui_slider_id(int id, vec4 rect, const char *skin, float min, float max, fl
     cursorrect.x += cursorpos.x;
     cursorrect.y += cursorpos.y;
     cursorrect.z = cursorsize.x;
-    cursorrect.w = cursorsize.y;
+    cursorrect.w = max(cursorsize.y, rect.w);
     if (last_skin->drawrect) last_skin->drawrect(last_skin->userdata, cursorskin, fbcursor, cursorrect);
 
     return entry->held && (old_value!=*value);

engine/v4k.c

@@ -10237,6 +10237,7 @@ typedef struct font_t {
     int height;      // bitmap height
     int width;       // bitmap width
     float font_size; // font size in pixels (matches scale[0+1] size below)
+    float factor;    // font factor (font_size / (ascent - descent))
     float scale[7];  // user defined font scale (match H1..H6 tags)
 
     // displacement info
@@ -10300,6 +10301,27 @@ void font_color(const char *tag, uint32_t color) {
     }
 }
 
+void ui_font() {
+    for( int i = 0; i < countof(fonts); ++i ) {
+        if( ui_collapse(va("Font %d", i), va("%p%d", &fonts[i], i) ) ) {
+            font_t *f = &fonts[i];
+            // changed = i+1;
+            // for( int j = 0; j < array_count(a->anims[i].frames); ++j ) {
+            //     if( ui_collapse(va("[%d]",j), va("%p%d.%d", a, a->anims[i].name,j) ) ) {
+            //         ui_unsigned("Frame", &a->anims[i].frames[j]);
+            //         ui_atlas_frame(a->frames + a->anims[i].frames[j]);
+            //         ui_collapse_end();
+            //     }
+            // }
+            ui_float("Ascent", &f->ascent);
+            ui_float("Descent", &f->descent);
+            ui_float("Line Gap", &f->linegap);
+            f->linedist = (f->ascent-f->descent+f->linegap);
+            ui_collapse_end();
+        }
+    }
+}
+
 void font_scales(const char *tag, float h1, float h2, float h3, float h4, float h5, float h6) {
     font_init();
 
@@ -10445,13 +10467,14 @@ void font_face_from_mem(const char *tag, const void *ttf_data, unsigned ttf_len,
     stbtt_InitFont(&info, ttf_data, stbtt_GetFontOffsetForIndex(ttf_data,0));
 
     int a, d, l;
-    float s = stbtt_ScaleForPixelHeight(&info, f->font_size);
+    if (!stbtt_GetFontVMetricsOS2(&info, &a, &d, &l))
-    stbtt_GetFontVMetrics(&info, &a, &d, &l);
+        stbtt_GetFontVMetrics(&info, &a, &d, &l);
 
-    f->ascent = a * s;
+    f->ascent = a;
-    f->descent = d * s;
+    f->descent = d;
-    f->linegap = l * s;
+    f->linegap = l;
-    f->linedist = (a - d + l) * s;
+    f->linedist = (a - d + l);
+    f->factor = (f->font_size / (f->ascent - f->descent));
 
     // save some gpu memory by truncating unused vertical space in atlas texture
     {
@@ -10569,8 +10592,6 @@ void font_face_from_mem(const char *tag, const void *ttf_data, unsigned ttf_len,
     glUniform2f(glGetUniformLocation(f->program, "res_bitmap"), f->width, f->height);
     glUniform2f(glGetUniformLocation(f->program, "res_meta"), f->num_glyphs, 2);
     glUniform1f(glGetUniformLocation(f->program, "num_colors"), FONT_MAX_COLORS);
-    glUniform1f(glGetUniformLocation(f->program, "offset_firstline"), f->linedist-f->linegap);
-
     (void)flags;
 }
 
@@ -10631,6 +10652,7 @@ void font_draw_cmd(font_t *f, const float *glyph_data, int glyph_idx, float fact
     glUseProgram(f->program);
     glUniform1f(glGetUniformLocation(f->program, "scale_factor"), factor);
     glUniform2fv(glGetUniformLocation(f->program, "string_offset"), 1, &offset.x);
+    glUniform1f(glGetUniformLocation(f->program, "offset_firstline"), f->ascent*f->factor);
 
     GLint dims[4] = {0};
     glGetIntegerv(GL_VIEWPORT, dims);
@@ -10682,7 +10704,7 @@ vec2 font_draw_ex(const char *text, vec2 offset, const char *col, void (*draw_cm
     font_t *f = &fonts[0];
     int S = 3;
     uint32_t color = 0;
-    float X = 0, Y = 0, W = 0, L = f->linedist*f->scale[S], LL = L; // LL=largest linedist
+    float X = 0, Y = 0, W = 0, L = f->ascent*f->factor*f->scale[S], LL = L; // LL=largest linedist
     offset.y = -offset.y; // invert y polarity
 
     // utf8 to utf32
@@ -10697,7 +10719,10 @@ vec2 font_draw_ex(const char *text, vec2 offset, const char *col, void (*draw_cm
             // change cursor, advance y, record largest x as width, increase height
             if( X > W ) W = X;
             X = 0.0;
-            Y -= L;
+            Y -= f->linedist*f->factor*f->scale[S];
+            if (i+1==end) { //@hack: ensures we terminate the height at the correct position
+                Y -= (f->descent+f->linegap)*f->factor*f->scale[S];
+            }
             continue;
         }
         if( ch >= 1 && ch <= 6 ) {
@@ -10706,11 +10731,12 @@ vec2 font_draw_ex(const char *text, vec2 offset, const char *col, void (*draw_cm
             t = text_glyph_data;
 
             // reposition offset to align new baseline
-            offset.y += (f->linedist - f->linegap) * ( f->scale[ch] - f->scale[S] );
+            // @fixme:
+            // offset.y += (f->linedist - f->linegap) * ( f->scale[ch] - f->scale[S] );
 
             // change size
             S = ch;
-            L = f->linedist*f->scale[S];
+            L = f->ascent*f->factor*f->scale[S];
             if(L > LL) LL = L;
             continue;
         }
@@ -11291,7 +11317,7 @@ bool gui_slider_id(int id, vec4 rect, const char *skin, float min, float max, fl
     cursorrect.x += cursorpos.x;
     cursorrect.y += cursorpos.y;
     cursorrect.z = cursorsize.x;
-    cursorrect.w = cursorsize.y;
+    cursorrect.w = max(cursorsize.y, rect.w);
     if (last_skin->drawrect) last_skin->drawrect(last_skin->userdata, cursorskin, fbcursor, cursorrect);
 
     return entry->held && (old_value!=*value);

engine/v4k.h

@@ -2187,6 +2187,7 @@ API void  font_face(const char *face_tag, const char *filename_ttf, float font_s
 API void  font_face_from_mem(const char *tag, const void *ttf_buffer, unsigned ttf_len, float font_size, unsigned flags);
 API void  font_scales(const char *face_tag, float h1, float h2, float h3, float h4, float h5, float h6);
 API void  font_color(const char *color_tag, uint32_t color);
+API void  ui_font();
 
 // commands
 API vec2  font_xy();